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OpenBTS is an implementation of the GSM air interface (Um) that allows cellular handsets to be used directly as SIP endpoints. It uses a software-defined radio to generate its air interface and uses Asterisk or yate as its network interface.
ham radio repeater software controlled controler run your own repeater without expensive hardware just your computer and transcievers made for linux/unix we need help creating this so please email me at kc8yho@kc8yho.org to join in.
This project is aimed primarily at users of the Icom R20 Communications Receiver and it's predecessors (R3, R5, R10). The intent is to provide ability to extend the capabilities of the radio, and provide an API to programmers interested in it.